Finding Feature Information

Your software release might not support all the features documented in this module. For the latest caveats and feature information, see the Bug Search Tool at https://tools.cisco.com/bugsearch
and the release notes for your software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the “New and Changed Information” chapter or the Feature History table below.

Information About OBFL

OBFL Overview

Cisco NX-OS provides the ability to log failure data to persistent storage, which you can retrieve and display for analysis at a later time. This onboard failure logging (OBFL) feature stores failure and environmental information in nonvolatile memory on the module. The information will help analyze failed modules.

The data stored by OBFL include the following:

Time of initial power-on

Slot number of the module in the chassis

Initial temperature of the module

Firmware, BIOS, FPGA, and ASIC versions

Serial number of the module

Stack trace for crashes

CPU hog information

Memory leak information

Software error messages

Hardware exception logs

Environmental history

OBFL-specific history information

ASIC interrupt and error statistics history

ASIC register dumps

OBFL stores a kernel trace in case Cisco NX-OS crashes.

Virtualization Support

You must be in the default virtual device context (VDC) to configure and display OBFL information. See the
Cisco Nexus 7000 Series NX-OS Virtual Device Context Configuration Guide
for more information on VDCs.

Licensing Requirements for OBFL

The following table shows the licensing requirements for this feature:

Product

License Requirement

Cisco NX-OS

OBFL requires no license. Any feature not included in a license package is bundled with the Cisco NX-OS system images and is provided at no extra charge to you. For a complete explanation of the Cisco NX-OS licensing scheme, see the
Cisco NX-OS Licensing Guide
.

Prerequisites for OBFL

If you configure VDCs, install the appropriate license and enter the desired VDC
.
See the
Cisco Nexus 7000 Series NX-OS Virtual Device Context Configuration Guide
for configuration information and the
Cisco NX-OS Licensing Guide
for licensing information.

You must have network-admin user privileges and be logged into the default VDC.

Guidelines and Limitations

OBFL has the following guidelines and limitations:

OBFL is enabled by default.

OBFL flash supports a limited number of writes and erases. The more logging you enable, the faster you use up this number of writes and erases.

Note Be aware that the Cisco NX-OS commands for this feature may differ from those commands used in Cisco IOS.